Effect of airflow channel arrangement on the discharge of a composite metal foam‐phase change material heat exchanger

Talebizadehsardari, Pouyan; Mohammed, Hayder I.; Mahdi, Jasim M.; Gillott, Mark; Walker, Gavin S.; Grant, David M.; Giddings, Donald

doi:10.1002/er.5949

Cited by 38 publications

(17 citation statements)

References 54 publications

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“…Still, a major concern for the LHTES system is PCM's minimal thermal Energies 2021, 14, 7179 2 of 23 efficiency, which decreases the phase change rate [14][15][16][17]. Researchers developed several techniques to improve the heat transfer rate of such systems, including the expansion of the heat transfer surface area [18][19][20], adding micro or nano-sized particles [21][22][23][24], using cascade layer PCM [25], encapsulation techniques [26,27], changing the location of the heat transfer fluid (HTF) channel [28][29][30], fins combinations [31][32][33], conductive foams [34][35][36], and using magnetic fields [37,38].…”

Section: Introductionmentioning

confidence: 99%

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

et al. 2021

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This work evaluates the influence of combining twisted fins in a triple-tube heat exchanger utilised for latent heat thermal energy storage (LHTES) in three-dimensional numerical simulation and comparing the outcome with the cases of the straight fins and no fins. The phase change material (PCM) is in the annulus between the inner and the outer tube, these tubes include a cold fluid that flows in the counter current path, to solidify the PCM and release the heat storage energy. The performance of the unit was assessed based on the liquid fraction and temperature profiles as well as solidification and the energy storage rate. This study aims to find suitable and efficient fins number and the optimum values of the Re and the inlet temperature of the heat transfer fluid. The outcomes stated the benefits of using twisted fins related to those cases of straight fins and the no-fins. The impact of multi-twisted fins was also considered to detect their influences on the solidification process. The outcomes reveal that the operation of four twisted fins decreased the solidification time by 12.7% and 22.9% compared with four straight fins and the no-fins cases, respectively. Four twisted fins improved the discharging rate by 12.4% and 22.8% compared with the cases of four straight fins and no-fins, respectively. Besides, by reducing the fins’ number from six to four and two, the solidification time reduces by 11.9% and 25.6%, respectively. The current work shows the impacts of innovative designs of fins in the LHTES to produce novel inventions for commercialisation, besides saving the power grid.

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Section: Introductionmentioning

confidence: 99%

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

et al. 2021

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“…The transient, Newtonian, and laminar fluid flow of liquid PCM  Neglecting viscous dissipation  Volume expansion is neglected [37] Conservation of mass:…”

Section: Mathematical Modelingmentioning

confidence: 99%

Intensifying the Charging Response of a Phase-Change Material with Twisted Fin Arrays in a Shell-And-Tube Storage System

et al. 2021

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A twisted-fin array as an innovative structure for intensifying the charging response of a phase-change material (PCM) within a shell-and-tube storage system is introduced in this work. A three-dimensional model describing the thermal management with charging phase change process in PCM was developed and numerically analyzed by the enthalpy-porosity method using commercial CFD software. Efficacy of the proposed structure of fins for performing better heat communication between the active heating surface and the adjacent layers of PCM was verified via comparing with conventional longitudinal fins within the same design limitations of fin material and volume usage. Optimization of the fin geometric parameters including the pitch, number, thickness, and the height of the twisted fins for superior performance of the proposed fin structure, was also introduced via the Taguchi method. The results show that a faster charging rate, higher storage rate, and better uniformity in temperature distribution could be achieved in the PCMs with Twisted fins. Based on the design of twisted fins, it was found that the energy charging time could be reduced by up to 42%, and the energy storage rate could be enhanced up to 63% compared to the reference case of straight longitudinal fins within the same PCM mass limitations.

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“…From a design perspective, the selection of adequate PCM casing and the incorporation of the proper mass/volume of the enhancement material are two crucial steps for overcoming issues of low PCM-to-demand responding rates. The high conductivity nanoparticles [26,27], extended fins [28][29][30][31][32][33][34] and porous matrices [35][36][37][38][39] are among the most famous enhancement materials. Applying fins to increase the heat-transfer area in charge is considered the most traditional technique for improving the thermal response in energy systems.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Heat Transfer Enhancement in a Triple Tube Latent Heat Storage System Using Circular Fins with Inline and Staggered Arrangements

et al. 2021

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Inherent fluctuations in the availability of energy from renewables, particularly solar, remain a substantial impediment to their widespread deployment worldwide. Employing phase-change materials (PCMs) as media, saving energy for later consumption, offers a promising solution for overcoming the problem. However, the heat conductivities of most PCMs are limited, which severely limits the energy storage potential of these materials. This study suggests employing circular fins with staggered distribution to achieve improved thermal response rates of PCM in a vertical triple-tube heat exchanger involving two opposite flow streams of the heat-transfer fluid (HTF). Since heat diffusion is not the same at various portions of the PCM unit, different fin configurations, fin dimensions and HTF flow boundary conditions were explored using computational studies of melting in the PCM triple-tube system. Staggered configuration of fin distribution resulted in significant increases in the rates of PCM melting. The results indicate that the melting rate and heat charging rate could be increased by 37.2 and 59.1%, respectively, in the case of staggered distribution. Furthermore, the use of lengthy fins with smaller thickness in the vertical direction of the storage unit resulted in a better positive role of natural convection; thus, faster melting rates were achieved. With fin dimensions of 0.666 mm × 15 mm, the melting rate was found to be increased by 23.6%, when compared to the base case of 2 mm × 5 mm. Finally, it was confirmed that the values of the Reynolds number and inlet temperatures of the HTF had a significant impact on melting time savings when circular fins of staggered distribution were included.

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Effect of airflow channel arrangement on the discharge of a composite metal foam‐phase change material heat exchanger

Cited by 38 publications

References 54 publications

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

Intensifying the Charging Response of a Phase-Change Material with Twisted Fin Arrays in a Shell-And-Tube Storage System

Investigation of Heat Transfer Enhancement in a Triple Tube Latent Heat Storage System Using Circular Fins with Inline and Staggered Arrangements

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